阅读理解 Halloween is a holiday full of tricks and treats and allthings frightening and fun. But what happens when you trade your sweets for ascare? The result is always healthier than candy. Being frightened can be good for you. Think about yourfavorite scary books or movies. You are scared but you just can't resistreading or watching them. Being frightened makes your brain flood with healthychemical substances that excite your mood and release feelings of greatexcitement. When you're frightened, your body also produces a chemicalcalled oxytocin, which helps people bond with one another.